| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Hume-Rothery Symposium on Thermodynamics of Microstructure Stability and Evolution
|
| Presentation Title |
Stress-induced reaction heterogeneity in battery electrodes |
| Author(s) |
Ming Tang |
| On-Site Speaker (Planned) |
Ming Tang |
| Abstract Scope |
Hume-Rothery’s groundbreaking work reveals the influence of lattice strain on the phase stability of alloys. In honoring Prof. Long-Qing Chen, the 2025 TMS Hume-Rothery Awardee who is at the forefront of exploring the stress effect on material microstructure evolution, I will discuss how stress contributes to reaction heterogeneity in rechargeable batteries in this presentation. Non-uniform reaction distribution in batteries adversely impacts battery performance and lifespan, leading to capacity under-utilization and over-(dis)charging. While mass transport limitations are often cited as the culprit, thermodynamic factors like stress also play an important role. I will present experimental evidence of stress-induced instability in lithium intercalation at single-particle, agglomerate and electrode levels, alongside theoretical analysis to elucidate such phenomena. Our research also uncovers that stress provides a driving force for filament nucleation and growth on lithium/zinc metal anodes, which points to stress relief as an effective approach to stabilizing the morphology of metallic anodes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Modeling and Simulation, Phase Transformations |